Lighting problems (smooth shading)


I’v load a object from an object file,
I used to work on wire frame mode and now I want it to have smooth shading.
But, I can’t manage to do it.My object now still looks like its having flat shading.For example: a top view of a teapot makes it looks 2D.Cant see the outline of the teapot cover.
Do not know where the problem lies.
Heres a portion the code.

 float mat_specular[]={1.0f, 1.0f, 1.0f, 1.0f};
      float mat_shininess[]={50.0f};
      float light_position[]={-2.0f, -3.0f, 4.0f, 0.0f};
      float white_light[]={1.0f, 1.0f, 1.0f, 1.0f};
      float lmodel_ambient[]={0.1f, 0.1f, 0.1f, 1.0f};
      gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
      // Set smooth shading mode for drawing the object
      gl.glMaterialfv(gl.GL_FRONT, gl.GL_SPECULAR, mat_specular,0);
      gl.glMaterialfv(gl.GL_FRONT, gl.GL_SHININESS,mat_shininess,0);

      gl.glLightfv(gl.GL_LIGHT0, gl.GL_POSITION, light_position, 0);
      gl.glLightfv(gl.GL_LIGHT0, gl.GL_DIFFUSE, white_light, 1);
      gl.glLightfv(gl.GL_LIGHT0, gl.GL_SPECULAR, white_light, 1);
      gl.glLightModelfv(gl.GL_LIGHT_MODEL_AMBIENT, lmodel_ambient,2);

I then draw the model is the display() method.

//draw the model 

Thanks for the help.

Basic question: Did you specify the normals of your teapot?

What do you mean by specify normal?
Sorry I am not fermiliar with the terms…
but I think I have a normal array or something…